Fast decoupled load flow methods in rectangular coordinates

Abstract

The fast decoupled load flow method of Stott and Alsac in polar co-ordinates (FDLP) is possibly the most popular method used by utilities to date, due to its reduced memory requirement and faster rate of convergence. However, no proper attempts appear to have been made to develop its counterpart in rectangular coordinates. This paper reviews an existing model of the fast decoupled load flow method in rectangular coordinates (FDLR) and presents three new versions. The potential of the new models of FDLR, as compared to its existing model and the FDLP model, have been tested on two IEEE test systems, for well-behaved and ill-conditioned cases.